• 수산해양기술연구
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• 제41권2호
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• pp.147-155
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• 2005

This study was conducted in order to improve the automatic fishing operation system for anchovy boat seine by comparison with the fishing gear geometry and efficiency using the labor saving nets and the combined type net with midwater trawl. Field experiments were carried out to observe the geometry of nets and improve the fishing operation system by catcher boats. The vertical net opening of fore wing net, square, fore bag net and after bag net of the combined type net were varied in the range of 9.9~12.9. 16.2~28.2, 6.8~12.1 and 9.5~15.2m respectively, when the towing speed was 1.0m/sec and the distance between boats were 100m, 200m, 300m. The vertical net opening of the combined type nets was gradually decreased as function of with increasing the distance between catcher boats. Labor saving net which was maintained the net opening and towing depth stable was more suitable for the automatic hauling operation system by improvement of bag net rather than the combined type nets which was impossible in swallow depth and near to anchovy school. 3 boats hauling operation system of the labor saving net was carried out by crane with power block in 2 catcher boats for improvement of hauling operation and pushing equipment of anchovy cooking system in the processing boat for maintain more anchovy in dry frame. From the results of field experiments, 3 boats hauling operation system with power block and improved cooking system was very 3 boats hauling operation system with power block and improved cooking system was very useful and more practical as hauling time 20~35min and No. of fishermen 12~13 in comparison with the traditional system such as hauling time 30~50 min and No. of fishmen 28~38.

• 수산해양기술연구
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• 제41권1호
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• pp.9-16
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• 2005

기선권현망어업의 어구 개량과 조업시스템 개선을 목적으로 생력형어구를 제작하여 현장조업선에 의한 해상실험을 실시하여 어구의 형상과 조업시스템을 관찰한 결과를 요약하면 다음과 같다. 1. 생력형 어구의 양선간격에 따른 오비기 앞끝, 오비기, 수비, 앞창, 자루그물 입구, 깔때기, 자루그물 뒤끝의 망고 변화폭은 각각 5.0${\sim}$7.8, 14.4${\sim}$21.1, 16.2${\sim}$21.2, 14.0${\sim}$17.3, 11.7${\sim}$13.9, 5.4${\sim}$6.9, 8.2${\sim}$9.8m이었고, 각 부분의 실제 전개율은 50${\sim}$78, 25${\sim}$36, 24${\sim}$31, 31${\sim}$38, 61${\sim}$73, 71${\sim}$91, 87${\sim}$104%로 나타났다. 2. 생력형 어구는 그물목줄 부착으로 오비기 앞끝의 전개가 신속하게 이루어지고 있으며, 개량된 나발그물 부착으로 축소형 개량어구보다 포켓형상을 대폭 개선시켜 어군의 유도가 매우 원활하였다. 또한, 양선간격 및 예망속도 변화에 따른 어구 형상이 매우 안정되었으며, 망고의 변화 폭이 크지 않아 어구의 전개성능이 향상되었다. 3. 자루그물의 개량으로 어구저항 감소, 예망속도 증대 및 입망된 어군의 도피가 현저히 감소하여 어획량이 현용어구보다 증가하였으며, 조업시스템의 개선이 가능하였다.

• 수산해양교육연구
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• 제26권1호
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• pp.98-107
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• 2014

As part of a series of studies about improving yellow croaker drift gill net fishing gear and the development of a labor-saving fishing system, we installed a labor-saving-type, five-step-drum net hauler, and a triple-V-type net hauler in 108 Daeheung-ho, a fishing boat which operates drift gill nets for yellow croakers mainly in the sea near Chu-ja Island. Net damage with the labor-saving-type, five-step-drum net hauler is lower than for the triple-V-type net hauler. In addition, there was a reduction in the standard operational crew of two people. The lead time for hauling the labor-saving net was approximately 10% and 19.2% less than for hauling the triple-V-type net hauler and for hauling by hand, respectively. It was found that there were fewer slip in fishing gear and less damage to the wing of the drum as well as less damage to the fish when the labor-saving-type, five-step-drum net hauler was used than when the triple-V-type net hauler was used. In the survey, the lead time for hauling the net was approximately 21.6% and 45.2% more effective than hauling with the triple-V-type net hauler and hauling by hand, respectively. The crew was reduced by approximately 18.2% and 25% than when hauling with the triple-V-type net hauler and hauling by hand, respectively. In addition, cessation of operation and damage to the fish were reduced when compared to the triple-V-type net hauler and hauling by hand.